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he geological hazards by abandoned coal mine woring in Mentougou region is very serious.In this region,high-resolution earth resistivity method has been used to detect the old mined out area. 针对门头沟区采空灾害十分严重的情况，采用二维自动地电阻率方法进行探测。
Eraluating the mined out area is one of effective and dependable ways for exploring placer gold. 指出以过采区为依据寻找砂金矿可靠性大，风险度小，是行之有效的途径之一。
The technical measures of the filling of mined out area employed in Dazhuangzi Gold Mine were introduced and an assumption to improve it further was put forward. 文中叙述了大庄子金矿井下采空区充填工艺,介绍了充填过程中的技术措施,并提出了进一步改进设想。
On the basis of the investigation,with the rockmass mechanics and numerical simulation, the mechanism of roof falling of stope and mined out area on a large scale are discussed compendiously. 根据近几年对石膏矿山的现场调查,结合岩体力学的相关理论和数值模拟技术,对石膏矿采场顶板冒落及大规模采空区顶板冒落机理作了简要探讨,据此提出了预防采空区冒落的措施。
Spacial location of mined out areas can be tested,which will guide next designing work. 通过现场钻探验证,揭示采空区的空间位置,对下步设计工作具有指导意义。
They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
After the whole area had been mined out,all the miners have left. 整个地区的矿全都挖光后，所有的矿工就都离开了这里。
That coal mine is no longer worked. 那个煤矿已经不经营了。
After the whole area has been mined out, all the miners have left. 整个地区的矿全都挖光后，所有的矿工就都离开了这里。
We decided to open out a coal mine near the city. 我们决定在城市附近开发一煤矿。
mined out area 采空区
The discovery of coal mine in the area enriched the people there. 这个地区煤矿的发现使得那里的人民富裕起来了。
The coal mining area is in the center of the basin. 煤矿区位于盆地的中心。
They underwrote the coal mine's bonds. 他们同意买下该煤矿的未认购的股票。
Statistical analysis of the character of acoustic emission for nonlinear dynamical damage in mined out areas supported by composite rock materials 岩石基复合材料支护采空区动力失稳声发射特征统计分析
There is a coal mine near my home town. 我的家乡附近有一个煤矿。
The chief purser assigns out area of responsibility. 乘务长给我们分配责任区域。
The coal mine was closed down due to exhaustion. 这煤矿因矿源枯竭而关闭了。
They are developing a new coal mine. 他们在开发新煤矿。
Keywords Mine areas;mined out areas;complicated physical exploration;drilling;Zhangqiu in Jinan city;Yuegongqiao; 矿区;采空区;综合物探;钻探;月宫桥;济南章丘;